Slippy Map Plugin can't be loaded

[anonymous]

I've enabled slippy map plugin, but when I restart JOSM there is an error captured in the screenshot attached to this ticket.

I'm using Ubuntu Hardy 8.04.

Revision: 0.0.0.20081016+svn.r1042~ppa1

java.lang.NoSuchMethodError: org.openstreetmap.josm.data.Preferences.put(Ljava/lang/String;Ljava/lang/String;)Z

at org.openstreetmap.josm.plugins.slippymap.SlippyMapPreferences.getMapUrl(Unknown Source) at org.openstreetmap.josm.plugins.slippymap.SlippyMapPreferenceSetting.addGui(Unknown Source) at org.openstreetmap.josm.gui.preferences.PreferenceDialog.<init>(PreferenceDialog.java:92) at org.openstreetmap.josm.actions.PreferencesAction.actionPerformed(PreferencesAction.java:36) at javax.swing.AbstractButton.fireActionPerformed(AbstractButton.java:2012) at javax.swing.AbstractButton$Handler.actionPerformed(AbstractButton.java:2335) at javax.swing.DefaultButtonModel.fireActionPerformed(DefaultButtonModel.java:404) at javax.swing.DefaultButtonModel.setPressed(DefaultButtonModel.java:259) at javax.swing.AbstractButton.doClick(AbstractButton.java:374) at javax.swing.plaf.basic.BasicMenuItemUI.doClick(BasicMenuItemUI.java:1688) at javax.swing.plaf.basic.BasicMenuItemUI$Handler.mouseReleased(BasicMenuItemUI.java:1732) at java.awt.AWTEventMulticaster.mouseReleased(AWTEventMulticaster.java:289) at java.awt.Component.processMouseEvent(Component.java:6106) at javax.swing.JComponent.processMouseEvent(JComponent.java:3276) at java.awt.Component.processEvent(Component.java:5871) at java.awt.Container.processEvent(Container.java:2105) at java.awt.Component.dispatchEventImpl(Component.java:4467) at java.awt.Container.dispatchEventImpl(Container.java:2163) at java.awt.Component.dispatchEvent(Component.java:4293) at java.awt.LightweightDispatcher.retargetMouseEvent(Container.java:4461) at java.awt.LightweightDispatcher.processMouseEvent(Container.java:4125) at java.awt.LightweightDispatcher.dispatchEvent(Container.java:4055) at java.awt.Container.dispatchEventImpl(Container.java:2149) at java.awt.Window.dispatchEventImpl(Window.java:2478) at java.awt.Component.dispatchEvent(Component.java:4293) at java.awt.EventQueue.dispatchEvent(EventQueue.java:604) at java.awt.EventDispatchThread.pumpOneEventForFilters(EventDispatchThread.java:275) at java.awt.EventDispatchThread.pumpEventsForFilter(EventDispatchThread.java:200) at java.awt.EventDispatchThread.pumpEventsForHierarchy(EventDispatchThread.java:190) at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:185) at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:177) at java.awt.EventDispatchThread.run(EventDispatchThread.java:138)

[vitor.george@…]

slippymap plugin error screenshot

[anonymous]

Duplicate #1883.